Auxiliary lock for doors.



ABRAHAH SATZMAN, QF NEW YORK, N. Y.

AUXILIARY LOCK F013. DOORS.

Speclcatton ot Letters Patent.

Patented Feb. 25, 1913.

Application filed Jane 29. 1912. Serial No. 706.572.

To all whom it may concern.'

Be it known that I, Aaaanaw Sa'rznax, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Auxiliary Lock for Doors, of which the following is a full, clear, and exact description.

Among the principal objects winch the present invention has in view are: to provide means whereby a door may be secretly locked in closed position and from a distance, to n'event the unauthorized exit of u person iroin a room without the knowledge of the one in authoritv; to provide means for operatin a lock of the character named, and for re casing the same in the presence of a ersoii and without his knowledge; to provide an audible alarm operable by the lock when closed, and means for operatively controlling said alarm: and to provide a simple, etlicient and durable mechanism for operating said lock.

Reference is to be had to the accompanying drawings forming a partr of this specification, in which similar characters of reference indicate corresponding parts in all the views, and in which- Figure 1 is a diagrammatic view showing in plan a fragment of a store, the entrance door whereof may be secured with an auxiliary lock constructed and arranged in accordance with the present invention, and showing the disposition of the alarm external to the store; Fig. 2 is a diagrammatic view showin in elevation a fragment of the front walzl of a store and of the closure door therefor, and an auxiliary lock for said door and means for secretly operating the same; Fig. is a detail view, on an enlarged scale, showing the boltand means for automatically placing the saaie in operative osition to lock the door; Fig. 4 is a detaii, view, on an enlarged scale, in erspective, showingl means or setting an( releasing the auxi iary lock; and "ig. 5 is a detail view, on an enlarged scale, showing in perspective a small fragment of the closure door and striker plate for the bolt of the auxiliary lock, and means for preventingthe operation of said lock.

he present invention is particularly dcsi ed to provide for the protection of a sa esman in a store where the goods are exposd within the reach of a customer in a manner to enable him to make away with the same.

,With this object in view, the invention rimarily consists in furnishing a concealed ocking device to engage the door while in closed position, to prevent the opening thereof by 'the operation of the customary lock with whiclrthe door is provided: and to provide means conveniently accessible to the salesman, to be operated y him while interviewing a customer, and withoutthe knowled e of the customer.

It furt er consists in providing means for releasing the lock also without. the knowledge of the customer and prior to the departure of the customer.

As an adjunct to mv invention, there is rovided an electric bell signal, the operating circuit of which is closed mitomatically bg' the auxiliary locking device and when t e lock is operated, the operatin r circuit of said bell being manually eontrolied, to at will discontinue the same.

In the accompanying drawings the auxiliary lock consists rimarily of a bolt 10. The boit 10 is uitlalbly mounted in sliding bearings 11. llhe bearings 11 are rigidly mounted on a plate 1Q. The plate 12 is fixedly secured to the standing structure by means of screws 13. 'Io rovide a seat for the plate 12, the frame f-br the door A is partially cut awa to form a pocket for the said plate 1Q, w ich pocket is covered or concealed by the facing of the frana` ot' said door.

'lhc doot' A, as shown in Fi t'), is usuallv provided with a striker pate 11i. and the striker plate 14 is perforated to form a bolt-hole 15. ln mounting the platt` 14 and the plate 12, care is exercised that the bolt 10 registers with the hole 15 when the door A is in closed position. The bolt 10 is shot or moved forward into the hole 15 by spiral springs 16, which, as seen in Fig. 3, are anc ored to posts 17 and a cross bar 18, the latter being rigidly attached to the bolt 10.

Normally, the bolt 10 is held retracted, being drawn back from the striker plate 14 and the bolt-hole 15 thereof by a flexible connector 1S). The connector 19 is preferably constructed in sections, said sections being united by bell cranks 20, whereby the connector 19 may be extended to a station EES? .AVMLABL CGP distant from the door A, and may be led thereto secretly and through a tortuous route if such be necessary or desired. The end of the connector 1t) adjacent the bolt 10 is' connected to the cross bar 21 of a bail 22. The bail 22 is pivotally connected to the bar 18. The opposite end of the connector 1t) is united to a swingin member 23, which is extended from the un er side of a foot treadle 24. As seen in the drawings, the normal position of the foot treadle is flush with the fioor line B of the standing structure or store. I usually prefer thatvthe treadle 24 should be a board corres ionding to the floor boards of the store, and should be pivotally mounted thereto bv a hinge Q5. lt will be understood that this structure may be varied without passing beyond the scope of the present invention, the intention being to supply a foot-operated means for drawing upon the connector 1i) to retract the bolt 10 from its en agement with the door A and the striker-pliite 14 thereof. l have adopted the construction shown and above described because it has seemed to atlord more secrecv in the equipment. It will be understood also that while I lmve shown iu the accompanying drawings but one treadle 24 and one operating station, there may be adopted a series of such stations aml a number of treadles 24, as indicated in Fig. 1 of the drawings.

To hold the treadles 24 in the normal position, wherein the bolt. 10 is retracted. I lmve provided a pivot latch QG. The latch Q6 is preferably united to a standard 2T by means of a hinge 28. as seen best in Fig. 4 of the drawings. The latch Q0 is normally controlled by a weight 20 to move out 0f the path of the treadle 24, and is only disposed so that the bent )ortion 30 extends over tbe treadle when tihe operating cable 31 is drawn upon by the attendant, which is done when the attendant, by placing his foot on the treadle 94. depresses the same from the released posit-ion shown in dotted lines in l"i E2 to the eaitured position shown iu fu l lines in Fig.

The door-closin mechanism above described is provide with an electric alarm bell C, which is normally positioned outside the store, the purpose of which is to alarm the neighborhood in the event of an attack made upon the attendant or salesman within tbe store. It is the design that the alarm C can be o ierated only when the door A is closed, andI the bolt l0 is shot in holding position to said door. When the bolt is shot, as seen in Fig. 3 of the drawings, the bar 3Q impinges upon a plate 33 mounted on the plate 1Q. 'lhe plate 83 is suitably insulated from the plate 1Q, and forms a. terminal for the electric circuit incorporating the bell C, the battery D and the switch E. The wires 84, 35 and 36 constitute the remaining elements of the electric circuit. The wire 34 is electrically connected with the plate 32%, while the wire 35 is electrically connected with the plate 1Q. When the switch ll 1s closed, it will be seen that the shooting of the bolt 10 to enter the bolt-hole 15 and the door A causes the bar 3'2 t0 impiuge upon the plate 33 and close the electrical circuit through the bell C and the battery D, thereby causing the. former to sound an alarm. It will also be understood that when the switch E is kept open, the closing of the door 3Q upon the plate Bil does not have the ellect above mentioned.

'lhe slide plate BT is provided to cover the hole l5. yl`o do this, the plate is raised. using for this purpose the nail niek 3S. 'l`he plate 3T is used as a safety device to prevent the accidental shooting of the bolt 10 while, the owner or salesman is out ot the store equipped with the auxiliary locking device. By mounting said )late in the slides 39, to operate by gravity therein to uncover the hole 15, provision 1s made against the accidental movement of said plate to cover the hole 1li, placing thereby the auxiliary locking apparatus out of commission in a moment of emergency.

The auxiliary lock for doors above described is operated as followsz-When a customer enters the store equipped with this auxiliary lock, under suspicious circumstances or at. n time when the salesman or attendant is open to assault or in condition to be robbed bv the. customer snatehing any article exhibited, and makin away with the same, the salesman, in exiibiting his goods, moves to a position where he mav place lns foot on one or other of the treadles Q4. The door A is naturally closed after the customergains admittance to the store. Thesalesman, by now pressing upon the treadle 24, permits the weight 20 to overbalance the latch QU, causing the same to rotate on the hinge QS, to remove the bent )o1-tion 8O from engagement with the treadle 24. lhe salesman now )ermits the treadle Q4 to be quietly raised, being influenced thereto by the effect. of the springs 1G upon the connector 19 and parts connected therewith. The springs 16, in tlms pulling upon the cross bar 1S, move the bolt 10 to seat within the hole 15. Without the customer being aware, the door is now locked against egress until permitted by the `salesman operating the treadle 24. lf, in the course of the business, it proves that the salesmans suspicions are unfounded, he, by quietly pressin upon the treadle Q4, swings backward the ar 23, pulling thereb upon the connector 19 and )arts connecte therewith, to retract the boltlO from engagement with the hole 15. lVhen the treadle 24 is'in full depressed position, as seen in Fi r. 2 of the drawings, the. salesman, by pul ing upon the cable 31, lifts the latch QG and the llla') llt) 

